UPD753012GC NEC, UPD753012GC Datasheet - Page 21

• Manufacturer Part Number: UPD753012GC
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER
• Manufacturer: NEC

6. PERIPHERAL HARDWARE FUNCTIONS
6.1 Digital Input/Output Ports
Port (Pin Name)
PORT0
(P00-P03)
PORT1
(P10-P13)
PORT2
(P20-P23)
PORT3
(P30-P33)
PORT4
(P40-P43)
PORT5
(P50-P53)
PORT6
(P60-P63)
PORT7
(P70-P73)
BP0-BP7
There are four types of I/O ports as follows.
· CMOS input (PORT0, 1)
· CMOS input/output (PORT2, 3, 6, 7)
· N-channel open-drain input/output (PORT4, 5)
· Bit port output (BP0-BP7)
Total
4-bit input
4-bit I/O
4-bit I/O
(N-channel
open-drain,
13 V
withstanding)
4-bit I/O
1-bit output
Function
Table 6-1. Types and Features of Digital Ports
Dual function pins also function as output pins depending on
the operation mode when the serial interface function is used.
Dedicated 4-bit I/O port
Can be set to input mode or output mode in 4-bit
units.
Can be set to input mode or output mode in 1/4 bit
units.
Can be set to input mode
or output mode in 4-bit
units.
Can be set to input mode
or output mode in 1/4-bit
units.
Can be set to input mode
or output mode in 4-bit
units.
Outputs data bit-wise. Can be switched to LCD drive
segment output S24-S31 by software.
Operation & Features
Ports 4 and 5 are paired
and data can be input/
output in 8-bit units.
Ports 6 and 7 are paired
and data can be input/
output in 8-bit units.
PD753012, 753016, 753017
:
: 16
:
:
40
8
8
8
Also used for the INT4,
SCK, SO/SB0, SI/SB1 pins.
Also used for the INT0-
INT2 and TI0-TI2 pins.
Also used for the PTO0-
PTO2, PCL, BUZ pins.
Also used for the LCDCL,
SYNC pins.
On-chip pull-up resistor can
be specified bit-wise by
mask option.
Also used for the KR0-KR3
pins.
Also used for the KR4-KR7
pins.
Remarks
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